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42/3=r-1.3
We move all terms to the left:
42/3-(r-1.3)=0
We add all the numbers together, and all the variables
-(r-1.3)+14=0
We get rid of parentheses
-r+1.3+14=0
We add all the numbers together, and all the variables
-1r+15.3=0
We move all terms containing r to the left, all other terms to the right
-r=-15.3
r=-15.3/-1
r=15+0.3/1
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